Excuor Accelerates Development of PQC-Based USIM and eSIM, Expands Collaboration with Research Institutions

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Excuor is embarking on the development of USIM and eSIM solutions equipped with Post-Quantum Cryptography (PQC) technology. The company announced on April 21 that it will also engage in collaboration with related research institutions, aiming to pursue technology validation and joint research initiatives.

This development is being carried out in partnership with the Naoris Quantum Protocol. The core objective is to integrate PQC and distributed consensus verification technology into existing telecommunications and financial smart card businesses. In addition, Excuor is discussing joint research and technology validation with global corporations and domestic and international research institutions specializing in telecommunications security.

Excuor possesses proprietary technology for USIM chip operating systems (COS) as well as its own Internet of Things (IoT)-based eSIM technology, and has supplied more than 60 million USIM chips to Korea's three major mobile carriers to date.

The company plans to implement a system that generates and stores private keys using internal secure microcontrollers and cryptographic engines. Furthermore, a quantum-resistant digital signature algorithm will be adopted, enabling the authentication of devices and participation in the signature process for consensus messages. In this process, the USIM will serve as a hardware-based root of trust, while the device’s Trusted Execution Environment (TEE), operating system, and network server will share computational responsibilities.

According to Excuor, this architecture will enable various devices-including smartphones, vehicles, industrial IoT equipment, and wearables-to be expanded as verifiable security entities.

An Excuor official stated, "The quantum security business goes beyond simply changing cryptographic algorithms-device, network, authentication server, and key management systems all need to be transitioned together. USIM and eSIM are positioned in the core security area of a device, making them critical points for early commercialization."

The official added, "Collaborating with the global ecosystem to implement standard-based quantum SIMs could provide new growth momentum in the telecommunications, financial, and IoT security markets."

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